Details
| Original language | English |
|---|---|
| Article number | 4571 |
| Pages (from-to) | 1-13 |
| Number of pages | 13 |
| Journal | MATERIALS |
| Volume | 13 |
| Issue number | 20 |
| Publication status | Published - 14 Oct 2020 |
Abstract
During metal cutting, high temperatures of several hundred-degree Celsius occur locally at the cutting edge, which greatly impacts tool wear and life. Not only the cutting parameters, but also the tool material’s properties influence the arising cutting temperature which in turn alters the mechanical properties of the tool. In this study, the hardness and thermal conductivity of cemented tungsten carbides were investigated in the range between room temperature and 1000◦ C. The occurring temperatures close to the cutting edge were measured with two color pyrometry. The interactions between cemented carbide tool properties and cutting process parameters, including cutting edge rounding, are discussed. The results show that cemented carbides with higher thermal conductivities lead to lower temperatures during cutting. As a result, the effective hardness at the cutting edge can be strongly influenced by the thermal conductivity. The differences in hardness measured at room temperature can be equalized or evened out depending on the combination of hardness and thermal conductivity. This in turn has a direct influence on tool wear. Wear is also influenced by the softening of the workpiece, so that higher cutting temperatures can lead to less wear despite the same effective hardness.
Keywords
- Cemented carbide, Cutting, Hardmetals, Hardness, Mechanical properties, Thermal conductivity, Thermophysical properties
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: MATERIALS, Vol. 13, No. 20, 4571, 14.10.2020, p. 1-13.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of cemented carbide composition on cutting temperatures and corresponding hot hardnesses
AU - Vornberger, Anne
AU - Picker, Tobias
AU - Pötschke, Johannes
AU - Herrmann, Mathias
AU - Denkena, Berend
AU - Krödel, Alexander
AU - Michaelis, Alexander
N1 - Funding Information: Funding: This research was funded by the Deutsche Forschungsgemeinschaft (DFG), reference number HE 2457/21−1 and DE447/150−1.
PY - 2020/10/14
Y1 - 2020/10/14
N2 - During metal cutting, high temperatures of several hundred-degree Celsius occur locally at the cutting edge, which greatly impacts tool wear and life. Not only the cutting parameters, but also the tool material’s properties influence the arising cutting temperature which in turn alters the mechanical properties of the tool. In this study, the hardness and thermal conductivity of cemented tungsten carbides were investigated in the range between room temperature and 1000◦ C. The occurring temperatures close to the cutting edge were measured with two color pyrometry. The interactions between cemented carbide tool properties and cutting process parameters, including cutting edge rounding, are discussed. The results show that cemented carbides with higher thermal conductivities lead to lower temperatures during cutting. As a result, the effective hardness at the cutting edge can be strongly influenced by the thermal conductivity. The differences in hardness measured at room temperature can be equalized or evened out depending on the combination of hardness and thermal conductivity. This in turn has a direct influence on tool wear. Wear is also influenced by the softening of the workpiece, so that higher cutting temperatures can lead to less wear despite the same effective hardness.
AB - During metal cutting, high temperatures of several hundred-degree Celsius occur locally at the cutting edge, which greatly impacts tool wear and life. Not only the cutting parameters, but also the tool material’s properties influence the arising cutting temperature which in turn alters the mechanical properties of the tool. In this study, the hardness and thermal conductivity of cemented tungsten carbides were investigated in the range between room temperature and 1000◦ C. The occurring temperatures close to the cutting edge were measured with two color pyrometry. The interactions between cemented carbide tool properties and cutting process parameters, including cutting edge rounding, are discussed. The results show that cemented carbides with higher thermal conductivities lead to lower temperatures during cutting. As a result, the effective hardness at the cutting edge can be strongly influenced by the thermal conductivity. The differences in hardness measured at room temperature can be equalized or evened out depending on the combination of hardness and thermal conductivity. This in turn has a direct influence on tool wear. Wear is also influenced by the softening of the workpiece, so that higher cutting temperatures can lead to less wear despite the same effective hardness.
KW - Cemented carbide
KW - Cutting
KW - Hardmetals
KW - Hardness
KW - Mechanical properties
KW - Thermal conductivity
KW - Thermophysical properties
UR - http://www.scopus.com/inward/record.url?scp=85093977735&partnerID=8YFLogxK
U2 - 10.3390/ma13204571
DO - 10.3390/ma13204571
M3 - Article
AN - SCOPUS:85093977735
VL - 13
SP - 1
EP - 13
JO - MATERIALS
JF - MATERIALS
SN - 1996-1944
IS - 20
M1 - 4571
ER -